JP2011226609A - Stream sensing apparatus and composite valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation work by reducing valves and pipes provided in a body valve.SOLUTION: A stream sensing apparatus is provided halfway along piping, opens a main valve by reduction of a secondary side pressure to supply pressurized water, and outputs a stream sensing signal by a stream sensing part. A composite valve 60 is provided on a secondary side of the stream sensing apparatus. The composite valve 60 includes: a drain valve mechanism opening/closing by manual operation; and a relief valve mechanism opening when receiving the secondary side pressure exceeding a prescribed relief set pressure in a closed state of the drain valve mechanism to drain. The composite valve 60 suppresses generation of a peak pressure by incorporating the relief mechanism to a drain valve element 68 of the drain valve mechanism, for example, and performing opening-operation when the secondary side pressure exceeds the relief set pressure in the closed state of the drain valve mechanism.

Description

The present invention relates to a water flow detection device and a composite valve in a fire extinguishing facility such as a sprinkler facility.

  Conventionally, in sprinkler equipment, foam fire extinguishing equipment, and water spray equipment, a water flow detection device is provided in the middle of a pipe that supplies pressurized water from a pressurized water supply device to a head.

  In a sprinkler facility installed in a high-rise building, the water discharge pressure of the sprinkler head may exceed a prescribed upper limit on a lower floor near the pressurized water supply device. In such a part, pressure reducing valve equipment is installed in front of the flowing water detection device to perform pressure reduction.

  However, when installing the pressure reducing valve, a large number of gate valves and pipes are required. As a result, there is a problem that not only the equipment space is increased, but also industrial materials such as valves and piping materials and construction man-hours are increased.

  In order to solve such a problem, a water flow detection device with a secondary side pressure regulation function shown in FIG. 6 in which a function of a pressure reducing valve facility is added to the water flow detection device has been proposed (Patent Document 1).

  In FIG. 6, the flowing water detection device with the secondary pressure regulating function is a bypass pipe that connects the primary side and the secondary side of the valve body 110 with respect to the lift type valve body 110 having the piston 111 and the cylinder chamber 115. The secondary pressure of the flowing water detection device is monitored by a pressure adjustment pilot valve 125 provided at 122, and the pressurized water in the cylinder chamber 115 is controlled to flow out so that the secondary pressure becomes a set pressure value. The lift amount (opening) is controlled.

  In such a conventional water flow detection device with a secondary side pressure regulating function, the cylinder chamber 115 is connected to the primary side of the valve body 110 to introduce the primary side pressurized water. The pressurized water is discharged to the secondary side via the pressure regulating pilot valve 125 to reduce the pressure and lift and open the valve body 110 by the piston 111.

  In the normal monitoring state, when the pressure drops due to water leakage on the secondary side, the pressure regulating pilot valve 125 opens due to the pressure drop, and the pressurized water is supplied to the secondary side through the bypass path 122 to recover the set pressure value. The operation of supplying the inactive flow amount without opening the valve body 110 to be performed is performed.

  In addition, if the sprinkler operates and there is a flow of water that exceeds a certain amount in the event of a fire, the secondary pressure will drop rapidly, and the pressurized water in the cylinder chamber 115 will flow out to the secondary side as the pressure regulating pilot valve 125 opens. As a result, the pressure drops rapidly, and the piston 111 is lifted to widen the valve body 110, and the primary pressurized water is supplied to the secondary side to recover the set pressure value and continuously supplied. At this time, pressurized water flows into the cylinder chamber 115 from the primary side. However, an orifice 121 is provided on the primary side of the bypass passage 122 to suppress the primary side pressurized water and cause the pressure water in the cylinder chamber 115 to flow out to the secondary side. ing.

  As described above, when the sprinkler is operated, the valve body 110 is rapidly opened by the rapid pressure reduction of the cylinder chamber 115 due to the opening of the pressure regulating pilot valve 125. Therefore, the secondary pressure reduced by the water discharge from the sprinkler is rapidly recovered. After overshooting the set pressure value, it stabilizes at the set pressure value.

  However, if the secondary pressure greatly exceeds the set pressure value, there is a problem in terms of safety when, for example, a resin pipe or the like is used for the secondary side piping. Therefore, the safety valve 133 is separate from the pressure regulating pilot valve 125. To prevent high pressure from being applied to the secondary side.

  In particular, when the primary pressure is high, such as in the lower floors of a high-rise building, pressure reduction by the running water detector cannot be performed sufficiently, and the primary pressure is maintained until the set pressure value is stabilized after the valve is opened. Near high pressure may be applied to the secondary side, and by providing the safety valve 133, high pressure applied to the secondary side can be avoided.

In addition, a drain valve 140 is provided to drain the pressurized water charged to the secondary side of the flowing water detection device during maintenance such as to replace the device, if necessary.

Japanese Patent Laid-Open No. 11-128388

  However, in such a conventional water flow detection device with a secondary side pressure regulation function, in addition to the pressure regulation pilot valve and orifice provided for the secondary side pressure regulation, a safety valve and a drain valve are provided on the secondary side. It is necessary to connect to each drainage pipe, the device configuration becomes complicated accordingly, installation work of the running water detection device is difficult and time consuming, and when performing inspections in operation, other than the running water detection device The pressure regulating pilot valve, the orifice safety valve and the drain valve must be inspected, and if necessary, disassembled and cleaned, and there is a problem that the inspection takes time and effort.

The present invention is characterized by providing a water flow detection device and a composite valve that facilitate installation work and inspection by reducing valves and pipes provided in the water flow detection device.

The present invention is a flowing water detection device provided in the middle of a pipe, which opens the valve to supply pressurized water to the secondary side and outputs a flowing water detection signal by the flowing water detection unit.
A composite valve that is integrated with a drain valve mechanism that opens and closes by manual operation and a relief valve mechanism that opens and drains when the drain valve mechanism is closed and the pressure in the pipe exceeds a specified relief setting pressure. Is provided.

  Here, the relief valve mechanism is provided in the drain valve body that moves when the drain valve mechanism is opened and closed.

The drain valve mechanism of the composite valve is
A drain valve body having an inflow port communicating with the secondary side of the valve and a drain port communicating with the drain pipe;
A drain valve body that opens and closes in the axial direction relative to the valve seat communicating with the inflow port;
An opening / closing operation part for opening and closing the drain valve body in the axial direction;
With
The relief valve mechanism of the compound valve is
Relief valve having a drain valve body as a valve body and forming an input port communicating with the secondary pressure receiving surface, a valve seat communicating with the input port, a valve chamber following the valve seat, and a drain port connecting the valve chamber to the drain side Body,
A relief valve element that moves in the axial direction relative to the valve seat and can be freely opened and closed;
A spring that determines the relief setting pressure by urging the relief valve body in the closing direction;
It is provided with.

  The valve seat and the relief valve body of the relief valve mechanism are a valve body equipped with a disk-shaped elastic seal member that moves in the axial direction with respect to the valve seat that opens conically.

  The valve seat and the relief valve body of the relief valve mechanism are conical valve bodies that open and close by moving in the axial direction with respect to the valve seat that is opened in a cylindrical shape.

  A drain valve body having a relief valve mechanism and an open / close operation member are detachably attached to the drain valve body.

The present invention relates to a composite valve in which a drain valve mechanism that is manually opened and closed and a relief valve mechanism that opens and drains when a pipe internal pressure exceeding a predetermined relief set pressure is received in a closed state of the drain valve mechanism. Is integrally provided.

  According to the present invention, the drainage valve mechanism that is manually opened and closed is opened on the secondary side of the water flow detection device, and the secondary side pressure exceeding a predetermined relief set pressure is received when the drainage valve mechanism is closed. Since a composite valve with a relief valve mechanism for draining is provided, there is no need to provide a separate drain valve and a relief valve that functions as a safety valve, reducing the equipment installed around this valve and reducing the space between the valve and the equipment. It is possible to reduce the number of pipes, simplify and facilitate the installation work of the flowing water detection device, and reduce the number of inspection points at the time of inspection, thereby making the inspection work more efficient.

  In addition, since the composite valve has a drain valve body equipped with a relief valve mechanism and a drain opening / closing operation unit integrated with the drain valve body so as to be detachable, this integrated part can be removed from the drain valve body. By removing, the drain valve mechanism and the relief valve mechanism can be easily and easily inspected and cleaned.

Moreover, the same effect is acquired as a compound valve provided with the drain valve mechanism and the relief valve mechanism.

Explanatory drawing which showed embodiment of the flowing water detection apparatus by this invention in a normal monitoring state Sectional drawing which showed embodiment of the composite valve provided in FIG. Sectional view showing the drainage open state of the composite valve of FIG. Sectional drawing which showed other embodiment of the composite valve provided in FIG. FIG. 4 is a cross-sectional view illustrating the drainage open state of the composite valve of FIG. Explanatory drawing which showed the conventional flowing water detection apparatus provided with the secondary side pressure regulation function.

  FIG. 1 is an explanatory view showing an embodiment of a flowing water detection device according to the present invention in a normal monitoring state. In FIG. 1, the flowing water detection device 10 is provided in the middle of a branch pipe on each floor branched from a water supply main pipe to which a pressurized water supply apparatus such as a high-rise building is connected.

  In the flowing water detection device 10, a primary side inlet 14 is formed below the valve body 12, and a primary side pipe 18 is connected thereto via a gate valve 16. A secondary side outlet 20 is formed on the upper side of the valve body 12, a secondary side pipe 22 is connected to the secondary side pipe 22, and a sprinkler head is connected to the end of the secondary side pipe 22.

  Inside the valve body 12, the main valve 24 is slidably incorporated by a piston 28 integrally formed on the rear side, and is in contact with a valve seat 26 formed integrally on the valve body 12 side so as to be in a normal monitoring state. Then it is closed. A piston 28 formed behind the main valve 24 is slidably incorporated in the cylinder chamber 30, and a return spring 34 for urging the piston in the closing direction is incorporated in the cylinder chamber 30.

  A pipe 36 is connected to the outside from the opening of the seat surface of the valve seat 26 provided in the valve body 12 where the main valve 24 abuts, and a pressure switch 40 is connected to the tip of the pipe 36 via a signal stop valve 38. ing. The lower side of the pipe 36 is connected to the drain pipe side via an auto drip 42 and a check valve 44.

  The pressure switch 40 functions as a flowing water detection unit. When the main valve 24 is opened, pressurized water is introduced from the inlet of the valve seat 26 through the pipe 36, and the inflow amount by the pipe 36 reduces the discharge amount of the auto drip 42. If it exceeds, the timer is started by operating with pressure water added to the pressure switch 40, and when the pressure water is continuously applied for a predetermined time, a flowing water detection signal is output to the outside.

  The piston 28 formed integrally with the main valve 24, the cylinder chamber 30, and the return spring 34 constitute a main valve driving mechanism of the main valve 24 provided in the flowing water detection device 10. It is controlled by a pressure regulating pilot valve 50 provided in a bypass pipe 48 connecting the primary side and the secondary side.

  A check valve 52 and an orifice 54 are provided in the bypass pipe 48 on the primary side of the pressure regulating pilot valve 50. The orifice 54 suppresses the flow from the primary side when the cylinder chamber 30 is drained to the secondary side and the main valve 24 is opened by opening the pressure regulating pilot valve 50. The check valve 52 prevents the secondary pressure from being lowered by closing the check valve 52 even when the primary pressure is reduced. By introducing the check valve 52 into the bypass pipe 48, the flowing water detection device The entire 10 has a check valve structure.

  A cylinder chamber 30 is connected to a bypass pipe 48 connected to the pressure regulating pilot valve 50 via a pipe 49, and a manual release valve 55 is connected to the pipe 49.

  The manual release valve 55 forcibly drains the pressurized water in the cylinder chamber 30 by opening the manual release valve 55 in the event of an abnormality in which the opening / closing control of the main valve 24 of the flowing water detection device 10 cannot be performed for some reason. 24 can be moved to the fully open position by being pushed up by the primary pressure.

  The manual release valve 55 can also be used for pipe flushing work for removing dust in the pipe at the time of construction, or for manually removing the dust in the fully open state when dust or the like adheres to the valve seat. Further, a primary side pressure gauge 56 is connected to the primary side of the flowing water detection device 10, and a secondary side pressure gauge 58 is connected to the secondary side.

  In the present embodiment, a composite valve 60 that is integrally provided with a drain valve function and a relief valve function is connected to the secondary side of the flowing water detection device 10. In the normal monitoring state, the composite valve 60 has the drain valve function closed and the relief valve function is enabled. With the operation of the sprinkler head due to a fire, the main valve 24 is opened by the pressure regulating pilot valve 50 and the secondary side pressure regulation starts. In the event that an overshoot that temporarily becomes a high pressure occurs until then, the valve opens when it exceeds a predetermined relief set pressure, and operates as a safety valve that communicates with the drain pipe and suppresses the generation of peak pressure.

  Further, the composite valve 60 is opened by manual operation and communicated with the drain pipe when draining the pressurized water filled in the secondary side pipe as necessary.

  The operation of the flowing water detection device 10 in a fire is as follows. If the sprinkler head is activated during the fire and there is a flow of water that exceeds a predetermined amount, the secondary pressure drops rapidly, and the pressure regulating pilot valve 50 is opened in response to this, and the pressurized water in the cylinder chamber 30 is moved to the secondary side. The pressure decreases rapidly, the piston 28 is lifted and the main valve 24 is opened widely, and the primary side pressurized water is supplied to the secondary side to recover the set pressure value and continuously supplied. At this time, pressurized water flows into the cylinder chamber 30 from the primary side. However, the orifice 54 is provided on the primary side of the bypass pipe 48 to suppress the primary side pressurized water, and the pressure water in the cylinder chamber 30 flows out to the secondary side. ing.

  During operation of the sprinkler head, the valve 24 is opened rapidly due to abrupt pressure reduction of the cylinder chamber 30 due to the opening of the pressure regulating pilot valve 50. Therefore, the secondary pressure reduced by the water discharge from the sprinkler head is quickly recovered and set. After overshooting the pressure value, it stabilizes at the set pressure value.

  With respect to the overshoot of the secondary side pressure, the relief valve mechanism built in the composite valve 60 opens and drains when the relief set pressure is exceeded, thereby suppressing the generation of peak pressure.

  FIG. 2 is an explanatory view showing an embodiment of a composite valve provided in the flowing water detection device of FIG. In FIG. 2, the composite valve 60 has a drain valve body 61 formed integrally with the valve body of the water flow detection device, and an inflow port 62 communicating with the secondary side of the water flow detection device is formed on the right side. The drain valve body 61 may be formed separately from the valve body of the flowing water detection device and connected to the secondary side of the flowing water detection device by piping.

  A drain valve chamber 64 is formed in the drain valve body 61, and a drain port 66 is opened below the drain valve chamber 64 and connected to a drain pipe. A drain valve seat 65 is formed following the inflow port 62, and a drain valve body 68 moves in the axial direction with respect to the drain valve seat 65 so as to be freely opened and closed.

  The drain valve body 68 is moved in the axial direction with respect to the drain valve seat 65 by a screw portion 78b of an opening / closing operation rod 78 screwed into a screw hole 80 of a cover 76 provided detachably on the opposite side of the inflow port 62. It can be opened and closed freely. The opening / closing operation rod 78 is positioned between the retainer 90 accommodated in the drain valve body 68 and the plug 74 to prevent the opening / closing operation rod 78, and the screw portion 78b is screwed into the screw hole 80 of the cover 76, and the rear portion Is taken out of the cover 76 to form a rectangular operation portion 78c, and an operation handle having a rectangular hole is set in the rectangular operation portion 78 and rotated.

  An elastic valve body sheet 70 is attached to the tip of the drain valve body 68 by a support member 72, and the elastic valve body sheet 70 of the drain valve body 68 is pressed against the drain valve seat 65 by rotating the opening / closing operation rod 78 forward. Thus, the drain valve is closed so as to block between the inflow port 62 and the drain port 66. Further, by rotating the open / close operation rod 78 backward, the elastic valve body sheet 70 of the drain valve body 68 is separated from the drain valve seat 65, and the drain valve opened to communicate between the inflow port 62 and the drain port 66 is set.

  In contrast to the drain valve mechanism in such a composite valve 60, the relief valve mechanism is integrated into the drain valve body 68. The pressure receiving surface of the drain valve body 68 on the inflow port 62 side is provided with an inflow port 83 for a relief valve, and a relief valve seat 85 that opens conically following the inflow port 83 is formed.

  On the left side of the relief valve seat 85, a cylindrical relief valve body 82 in which an elastic valve body sheet 84 is fixed to a tip shaft portion with a retaining ring 86 is incorporated so as to be movable in the axial direction, and between the rear retainer 90. A predetermined relief set pressure at which the relief valve is opened by the load of the spring 88 is determined by the spring 88 disposed in the closing direction. Further, drainage holes 92 are formed at a plurality of locations in the circumferential direction in the drainage valve body 68 around the relief valve body 82.

  The operation as a relief valve in the composite valve 60 of FIG. 2 is as follows. In the normal monitoring state, the composite valve 60 is in a closed state in which the elastic valve body sheet 70 of the drain valve body 68 is pressed against the drain valve seat 65, and the secondary side pressure from the inflow port 62 is the inflow port 83 of the drain valve body 68. The pressure acting on the elastic valve body seat 84 of the relief valve body 82 in the closed state via the pressure is below the relief set pressure by the spring 88, so the flow path for the drain hole 92 is closed.

  When the main valve 24 is opened by the operation of the pressure regulating pilot valve 50 in FIG. 1 due to the operation of the sprinkler head due to a fire, the secondary pressure that has dropped due to water discharge from the sprinkler quickly recovers, and the set pressure value is overshot. After that, it stabilizes to the set pressure value.

  When the force that pushes the relief valve body 82 due to the increase in the secondary pressure accompanying the opening of the main valve 24 exceeds the relief set load by the spring 88, the relief valve body 82 moves against the spring 88 and the inflow port 83 is moved. The secondary pressure is communicated with the drainage hole 92 and the secondary side pressurizing water is allowed to flow through the drainage port 66, thereby suppressing the secondary side pressure to the relief set pressure and preventing the peak pressure from being generated.

  Next, the operation when the composite valve 60 is used as a drain valve will be described. FIG. 3 shows a case where the compound valve 60 of FIG. 2 is opened as a drain valve. When used as a drain valve, an operation handle is set on the rectangular shaft portion 78c of the opening / closing operation rod 78 taken out from the cover 76, and the opening / closing operation rod 78 is rotated in the backward direction.

  As shown in FIG. 3, the drain valve body 68 is moved backward by such an operation of the opening / closing operation rod 78, the elastic valve body seat 70 attached to the tip is separated from the drain valve seat 65, and the inflow port 62 and the drain port 66. As a result, the drain valve that communicates with each other is opened, and the pressurized water on the secondary side can be drained into the drain pipe.

  When the composite valve 60 is inspected, when the cover 76 screwed and fixed to the left side of the drain valve body 61 is removed, the opening / closing operation rod 78 and the drain valve body 78 are disassembled from the drain valve body 61 and taken out. It is possible to easily and easily perform the inspection of the drain valve seat 65, the disassembled drain valve body 68, the relief valve mechanism built in the drain valve body 68, and the cleaning thereof.

  When the drainage function of FIG. 2 is in the closed state, the opening / closing operation rod 78 can be further rotated in the closing direction on the right side, and the head portion 78a of the opening / closing operation rod 78 moves the retainer 90 and the relief valve 82 to the right. A function of releasing the function as the relief valve may be provided by further moving to the closed state and restricting movement in the opening direction. In this case, it is desirable to display a state instruction on the drain valve body 61 around the opening / closing operation rod 78 so that the setting / release state of the relief valve can be visually checked according to the rotation position of the opening / closing operation rod 78. .

  FIG. 4 is a cross-sectional view showing another embodiment of the composite valve shown in FIG. 1, and is characterized in that a conical valve body is used as a relief valve mechanism incorporated in a drain valve body.

  In FIG. 4, the drain valve mechanism is basically the same as the embodiment of FIG. That is, an inflow port 62 communicating with the secondary side of the water flow detection device is formed on the right side of the drain valve body 61, a drain valve chamber 64 is formed in the drain valve body 61, and a drain port 66 is opened below the drain valve chamber 64. is doing. Following the inflow port 62, a drain valve seat 65 is disposed on the drain valve chamber 64 side, and a drain valve body 68 is moved relative to the drain valve seat 65 in the axial direction so as to be freely opened and closed.

  The drain valve body 68 can be opened and closed by moving in the axial direction with respect to the drain valve seat 65 by an open / close operation rod 78 screwed into a screw hole 80 of a cover 76 detachably provided on the opposite side of the inflow port 62. Has been.

  The opening / closing operation rod 78 has a head portion 78a at the tip thereof positioned between the retainer 90 housed in the drain valve body 68 and the plug 74 to prevent it from coming off, and a screw portion 78b is screwed into the screw hole 80 of the cover 76, Is taken out of the cover 76 to form a rectangular operation portion 78c, and an operation handle having a rectangular hole is set in the rectangular operation portion 78 and rotated.

  An elastic valve body sheet 70 is attached to the tip of the drain valve body 68 by a retaining ring 77, and the open / close operation rod 78 is rotated forward to press the elastic valve body sheet 70 of the drain valve body 68 against the drain valve seat 65. Thus, the drainage valve is closed to block between the inflow port 62 and the drainage port 66.

  Further, by rotating the opening / closing operation rod 78 backward, the elastic valve body seat 70 of the drain valve body 68 is separated from the drain valve seat 65, and the drain valve opened to communicate between the inflow port 62 and the drain port 66 is opened. it can.

  The relief valve mechanism is incorporated in the drain valve body 68. The pressure receiving surface on the inflow port 62 side of the drain valve body 68 is provided with an inflow port 96 for a relief valve, and a filter 95 is disposed at the inflow port for removing dust. The opposite side of the inflow port 96 forms a relief valve seat 98 opened as a cylindrical hole.

  On the left side of the relief valve seat 98, a plunger-type relief valve body 94 having a conical valve portion 94a formed at the tip is disposed so as to be movable in the axial direction, and is connected to a cylindrical retainer 104 locked by a rear retaining ring 100. A predetermined relief set pressure at which the relief valve is opened by the load of the spring 108 is determined by being arranged therebetween and urged in the closing direction by the spring 106. Further, drainage holes 108 are formed at a plurality of locations in the circumferential direction in the drainage valve body 68 around the relief valve body 94.

  The operation as a relief valve in the composite valve 60 of FIG. 4 is as follows. In the normal monitoring state, the composite valve 60 is in a closed state in which the elastic valve body sheet 70 of the drain valve body 68 is pressed against the drain valve seat 65.

  When the main valve 24 is opened by the operation of the pressure regulating pilot valve 50 in FIG. 1 due to the operation of the sprinkler due to a fire, the secondary pressure that has dropped due to water discharge from the sprinkler quickly recovers, and after overshooting the set pressure value, Stable at the set pressure value.

  When the force pushing the relief valve element 94 due to the increase in the secondary pressure accompanying the opening of the main valve 24 exceeds the relief set load by the spring 106, the relief valve element 94 moves against the spring 106, The secondary pressure is communicated with the drain hole 108 and the secondary side pressurizing water is allowed to flow through the drain port 66, thereby suppressing the secondary side pressure to the relief set pressure and preventing the generation of the peak pressure.

  Next, the operation when the composite valve 60 is used as a drain valve is as shown in FIG. When used as a drain valve, an operation handle is set on the rectangular shaft portion 78c of the opening / closing operation rod 78, the opening / closing operation rod 78 is rotated in the backward direction, the drain valve body 68 is retracted, and the elastic valve body sheet 70 is drained. The drain valve opens away from the valve seat 65 and communicates between the inflow port 62 and the drain port 66, and the secondary pressurized water can be drained to the drain pipe.

  When the composite valve 60 is inspected, the opening / closing operation rod 78 and the drain valve body 78 are disassembled from the drain valve body 61 by removing the cover 76 screwed and fixed to the left side of the drain valve body 61. The drain valve seat 65 can be taken out, the disassembled drain valve body 68 can be inspected, the relief valve mechanism built in the drain valve body 68 can be inspected, and these can be cleaned easily and reliably. Can do.

  In the embodiment of FIG. 4 as well, the retainer 104 and the relief valve element 94 are fixed to the right side so that the opening / closing operation rod 78 is further moved toward the inlet 62 and the relief valve element 94 is not moved in the leftward opening direction. Thus, a configuration may be added that makes it possible to disable the relief valve function that keeps the communication between the inlet 96 and the drain port 66 closed. The relief valve function can be disabled when the relief valve function is not required in the flowing water detection device or when the valve closing state of the drain valve body 68 is checked during maintenance.

  In the above embodiment, the case where a composite valve is provided in the flowing water detection device is taken as an example. However, in another embodiment of the present invention, the composite valve 60 itself is provided, and the embodiment is shown in FIGS. 5 is basically the same as that shown in FIG. 5, but is not limited to the water flow detection device of FIG. 1, and can be used for appropriate equipment and equipment as a valve of piping equipment provided with a drain valve and a relief valve at the same time.

  Moreover, although the flowing water detection apparatus and composite valve of this embodiment showed the case where it applied to the sprinkler equipment for buildings, it is not restricted to this, It can apply also to fire extinguishing equipment for houses, etc. It can also be applied to detection devices and automatic valve devices for tunnel water spray equipment. The present invention is not limited to equipment in which the secondary side pipe is always filled with pressurized water, but can also be applied to equipment in which pressurized water is supplied to the secondary side pipe by opening a valve in the event of a fire.

Further, the present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Flowing water detection device 60: Compound valve 61: Drain valve body 62, 96: Inflow port 64: Drain valve chamber 65: Drain valve seat 66: Drain port 68: Drain valve body 70, 84: Elastic valve body sheet 76: Cover 78: Opening / closing operation rods 82, 83, 94: Relief valve body 85: Conical valve seat 88, 106: Spring 92, 108: Drain hole

Claims (12)

In the running water detection device that is provided in the middle of the pipe, opens this valve, supplies pressurized water to the secondary side, and outputs a running water detection signal by the running water detection unit.
The main valve is integrally provided with a drain valve mechanism that opens and closes by manual operation and a relief valve mechanism that opens and drains when the drain valve mechanism receives a pressure in the pipe that exceeds a predetermined relief setting pressure when the drain valve mechanism is closed. A flowing water detection device characterized by providing a composite valve.
In the flowing water detection device according to claim 1,
The water flow detection device, wherein the relief valve mechanism is provided inside a drain valve body that moves when the drain valve mechanism is opened and closed.
In the flowing water detection device according to claim 1,
The drain valve mechanism of the composite valve is:
A drain valve body having an inflow port communicating with the secondary side of the main valve and a drain port communicating with the drain pipe;
A drain valve body that moves in an axial direction to open and close the valve seat communicating with the inflow port;
An opening / closing operation member that opens and closes the drain valve body in the axial direction,
With
The relief valve mechanism of the composite valve is:
Using the drain valve body as a valve body, an input port communicating with the pressure receiving surface in the pipe, a valve seat communicating with the input port, a valve chamber following the valve seat, and a drain port communicating the valve chamber with the drain side are formed. Relief valve body,
A relief valve body that moves in the axial direction relative to the valve seat and can be freely opened and closed;
A spring that urges the relief valve body in a closing direction to determine the relief set pressure;
A running water detection device characterized by comprising:
In the flowing water detection device according to claim 1,
The valve seat and the relief valve body of the relief valve mechanism are valve bodies equipped with a disc-like elastic seal member that opens and closes by moving in the axial direction with respect to the valve seat that opens conically. apparatus.
In the flowing water detection device according to claim 1,
The flowing water detection device characterized in that the valve seat and the relief valve body of the relief valve mechanism are conical valve bodies that move in the axial direction with respect to a valve seat that is opened in a cylindrical shape to open and close.
2. The flowing water detection device according to claim 1, wherein a drain valve body provided with the relief valve mechanism and an opening / closing operation member are detachably attached to the drain valve body.
A drain valve mechanism that opens and closes by manual operation and a relief valve mechanism that opens and drains when receiving a pressure in the pipe that exceeds a predetermined relief set pressure when the drain valve mechanism is closed are integrally provided. Compound valve.
The compound valve according to claim 7,
The relief valve mechanism is provided in a drain valve body that moves when the drain valve mechanism is opened and closed.
The compound valve according to claim 7,
The drain valve mechanism of the composite valve is:
A drain valve body having an inflow port communicating with the secondary side of the main valve and a drain port communicating with the drain pipe;
A drain valve body that moves in an axial direction to open and close the valve seat communicating with the inflow port;
An opening / closing operation member that opens and closes the drain valve body in the axial direction,
With
The relief valve mechanism of the composite valve is:
Using the drain valve body as a valve body, an input port communicating with a secondary pressure receiving surface, a valve seat communicating with the input port, a valve chamber following the valve seat, and a drain port communicating the valve chamber with the drain side A formed relief valve body,
A relief valve body that moves in the axial direction relative to the valve seat and can be freely opened and closed;
A spring that urges the relief valve body in a closing direction to determine the relief set pressure;
A composite valve characterized by comprising:
The compound valve according to claim 7,
A composite valve characterized in that the valve seat and the relief valve body of the relief valve mechanism are a valve body equipped with a disk-like elastic seal member that moves in an axial direction with respect to a conically opened valve seat and opens and closes. .
The compound valve according to claim 7,
A composite valve characterized in that the valve seat and the relief valve body of the relief valve mechanism are conical valve bodies that move in the axial direction relative to a cylindrically opened valve seat and open and close.
  8. The composite valve according to claim 7, wherein a drain valve body provided with the relief valve mechanism and an opening / closing operation member are detachably attached to the drain valve body.

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